function validateEmail(email) {			
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (!filter.test(email)){	
		alert("Please provide a valid email address.!")
		return false;
	} else {									
		return true;
	}
}

function checkBlank(val){
	var newval = val.replace(/^\s*|\s*$/g, '');
	return newval;
}
function clearForm() {
	var frm = document.frmComment;	
	var len = frm.elements.length;
	for(var i=0;i<len;i++) {
		if( frm.elements[i].type != 'button' && frm.elements[i].type != 'submit') {
			frm.elements[i].value = "";
		}
	}
}

function validateComment() {
	var frm = document.frmComment;	
	if(checkBlank(frm.name.value) == "") {
		alert( "Please enter your name!" );
		frm.name.focus(); 
		return false;
	}
	if(!validateEmail(frm.email.value)) {
		frm.email.focus(); 
		return false;
	}
	if(checkBlank(frm.comment.value) == "") {
		alert( "Please enter your comment!" );
		frm.comment.focus(); 
		return false;
	}
	addComments();
}